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  1. /*
  2.  * Copyright (c) 2003-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup mips32 
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_mips32_ASM_H_
  36. #define KERN_mips32_ASM_H_
  37.  
  38. #include <arch/types.h>
  39. #include <config.h>
  40.  
  41.  
  42. static inline void cpu_sleep(void)
  43. {
  44.     /* Most of the simulators do not support */
  45. /*  asm volatile ("wait"); */
  46. }
  47.  
  48. /** Return base address of current stack
  49.  *
  50.  * Return the base address of the current stack.
  51.  * The stack is assumed to be STACK_SIZE bytes long.
  52.  * The stack must start on page boundary.
  53.  */
  54. static inline uintptr_t get_stack_base(void)
  55. {
  56.     uintptr_t v;
  57.    
  58.     asm volatile ("and %0, $29, %1\n" : "=r" (v) : "r" (~(STACK_SIZE-1)));
  59.    
  60.     return v;
  61. }
  62.  
  63. extern void cpu_halt(void);
  64. extern void asm_delay_loop(uint32_t t);
  65. extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg,
  66.               uintptr_t entry);
  67.  
  68. extern ipl_t interrupts_disable(void);
  69. extern ipl_t interrupts_enable(void);
  70. extern void interrupts_restore(ipl_t ipl);
  71. extern ipl_t interrupts_read(void);
  72.  
  73. /** No I/O port address space on MIPS. */
  74. static inline void outb(ioport_t port, uint8_t v)
  75. {
  76. }
  77.  
  78. /** No I/O port address space on MIPS. */
  79. static inline uint8_t inb(ioport_t port)
  80. {
  81.     return 0;
  82. }
  83.  
  84. #endif
  85.  
  86. /** @}
  87.  */
  88.